现河油区低渗稠油储层压裂可行性及裂缝导流能力研究

发布时间：2018-01-22 09:58

本文关键词： 压裂低渗稠油可压指数导流能力灰色关联　出处：《承德石油高等专科学校学报》2016年05期 　论文类型：期刊论文

【摘要】：现河油区低渗稠油储层地质储量大、动用程度低,因其储层岩性具备低渗致密砂岩和稠油疏松砂岩的双重属性,开发难度异常大。为解决此类开发难题,结合脆性指数与断裂韧性,建立模型计算该类储层的可压指数,并针对区块内已进行压裂改造的油井测算拟合,确定了可压指数的临界值,判断W152储层具备压裂可行性。同时进行低渗稠油储层条件下的裂缝导流能力评价实验,明确了裂缝在W152储层岩性条件下的导流能力,并对支撑剂、铺砂浓度等参数进行了优选,并通过灰色关联法对各因素对裂缝导流能力的影响程度进行了研究,最后通过数值模拟进行了导流能力对产能的影响,确定了施工参数对导流能力以及导流能力对产能的影响规律。
[Abstract]:The low permeability heavy oil reservoir in Xianhe oil area has large geological reserves and low production degree because of the dual properties of low permeability tight sandstone and heavy oil loose sandstone in its reservoir lithology and it is very difficult to develop in order to solve the problem of this kind of development. Combined with brittleness index and fracture toughness, the model is established to calculate the compressible index of this kind of reservoir, and the critical value of the compressible index is determined according to the calculation and fitting of the oil wells that have been fracturing in the block. At the same time, the fracture conductivity evaluation experiment under low permeability heavy oil reservoir condition is carried out, the flow conductivity of fracture under the lithologic condition of W152 reservoir is determined, and the proppant is analyzed. The parameters such as sand-laying concentration were optimized, and the influence of various factors on fracture conductivity was studied by grey correlation method. Finally, the influence of diversion capacity on productivity was carried out by numerical simulation. The influence of construction parameters on diversion capacity and capacity on productivity is determined.
【作者单位】：胜利油田分公司石油工程技术研究院;中国石油大学(华东)石油工程学院;胜利油田分公司现河采油厂工艺所;
【基金】：国家自然科学基金青年基金项目(径向钻孔引导水力压裂裂缝定向扩展机理研究):51404288
【分类号】：TE357
【正文快照】： 现河低渗稠油主要集中在以W152沙四为代表的丁家屋子断裂带东部,地质储量达1 000万t,控制储量430万t,是重要的资源接替阵地,稠油开发的潜力和意义巨大。根据深层稠油开发方式的筛选标准,确定该类难动用油藏主要开采技术思路为油层改造配套注汽热采[1]。然而以现河油区W152储层

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